Phonograph Monthly Review, Vol. 4, No. 2. Published Nov. 1929.
General Review - Axel B. Johnson The Musical Ladder (conc.) - Robert Donaldson Darrell Intelligent Listening Amplifying Installations for Schools: An Interview with Frank Irving Cooper Striving for the Perfect Program - Nathaniel Shilkret Phonographic Echoes Correspondence Analytical Notes and Reviews Our Contemporaries